JP7123639B2 - straddle-type vehicle - Google Patents

Description

The present invention relates to a straddle-type vehicle in which an air cleaner is arranged above the cylinder head of an engine.

In some straddle-type vehicles such as motorcycles, an air cleaner is arranged between a pair of left and right main frames above a cylinder head of an engine, and a fuel tank is arranged above the air cleaner (for example, Patent Document 1). ). In Patent Document 1, since the air cleaner is arranged above the cylinder head, it is easy to realize a downdraft structure, and it is possible to improve the output of the engine.

JP 2017-186942 A

However, in Patent Document 1, since the fuel tank is arranged above the air cleaner, it is difficult to secure the capacities of the air cleaner and the fuel tank. For example, if the vertical dimension of the fuel tank or air cleaner is increased, the height of the vehicle is increased and the center of gravity is also increased. Further, since the air cleaner is arranged between the pair of left and right main frames, if the size of the air cleaner in the left-right direction is increased, it is difficult to support the intermediate portion of the fuel tank in the front-rear direction.

SUMMARY OF THE INVENTION An object of the present invention is to provide a straddle-type vehicle in which the fuel tank is stably supported while securing the capacity of the air cleaner.

In order to achieve the above object, the straddle-type vehicle of the present invention includes a pair of left and right main frames extending rearward from a head pipe, and an air cleaner disposed above the cylinder head of an engine between the pair of left and right main frames. and a fuel tank disposed above the air cleaner, and a tank support portion for supporting the fuel tank, the recess being recessed inward in the vehicle width direction being formed in both side walls in the vehicle width direction of the cleaner case of the air cleaner. are provided so as to protrude inward in the vehicle width direction from the left and right main frames, and the tank support portion is arranged in the recess.

According to this configuration, the fuel tank is stably supported because the tank supporting portion supports the portion having the widest width in the longitudinally intermediate portion of the fuel tank. Since the overall size of the cleaner case in the vehicle width direction does not change simply by providing the concave portions in the vehicle width direction side walls of the cleaner case, the capacity of the air cleaner can be secured.

In the present invention, the width dimension between the left and right recesses inside the cleaner case may be set smaller than the width dimension of the cleaner element inside the cleaner case. According to this configuration, it is possible to secure the space for providing the tank support portion while securing the surface area (filtering area) of the cleaner element. In this case, the cleaner element has a filter portion through which air passes and a mounting portion on the outer periphery of the filter portion, and even if the width dimension between the recesses is set larger than the width dimension of the filter portion. good. According to this configuration, even if the cleaner case is provided with the concave portion, an air passage having a width equal to or larger than the width of the filter portion is ensured.

When the width dimension between the recesses is set smaller than the width dimension of the cleaner element, the engine is a multi-cylinder engine in which a plurality of cylinders are arranged in the vehicle width direction, and the outlet of the air cleaner corresponds to each cylinder. and arranged side by side in the vehicle width direction, and the width dimension between the recesses may be set smaller than the width dimension of the outlet. Here, the "width dimension of the outlet" refers to the distance between the outer edges in the vehicle width direction of the outlets at both ends of the outlets arranged in the vehicle width direction. According to this configuration, it is possible to secure the space for providing the tank support portion while securing the capacity of the air cleaner by increasing the width dimension in the vicinity of the outlet of the air cleaner.

The present invention further comprises a throttle body that connects the outlet of the air cleaner and the intake port of the cylinder head, and a bottom wall of the cleaner case that is recessed upward to accommodate a portion of the throttle body. A place may be formed. According to this configuration, interference between the throttle body and the cleaner case can be avoided while the capacity of the air cleaner is ensured by disposing the bottom portion of the cleaner case as low as possible.

In the present invention, the cleaner case may be configured by connecting upper and lower case halves, and the mating surfaces of the two case halves may extend in the front-rear direction along the main frame. According to this configuration, the cleaner element can be attached and detached by removing the fuel tank and the upper half of the case because the upper and lower parts are divided, so maintenance is easy. In addition, since the mating surfaces extend along the main frame, it is easy to prevent interference between the connecting portion of the case halves and the main frame.

In the case where the cleaner case is configured by connecting upper and lower case halves at mating surfaces, an inlet and a cleaner element are provided in the front half of the air cleaner, an outlet is provided in the rear half, and the front half of the air cleaner is provided. An electronic control unit is attached to the upper surface of the air cleaner, the inlet is formed in the lower part of the front half of the air cleaner, and the upper surface of the front half of the air cleaner is inclined upward toward the rear with respect to the mating surface. good.

According to this configuration, by inclining the upper surface (upper wall) of the front half, the air is guided rearward by the upper wall, and the air flows smoothly. In addition, since it is not necessary to incline the upper wall of the rear half, the volume (height) of the clean room can be ensured. Also, since the electronic control unit is arranged near the engine, the length of the cable between the engine and the electronic control unit can be shortened. As a result, it is possible to reduce the weight and prevent noise from entering the cable.

Furthermore, since the electronic control unit is attached to the inclined upper surface, the electronic control unit is also inclined forward and downward. As a result, it is possible to suppress the electronic control unit from pressing the fuel tank, and it is easy to secure the capacity of the fuel tank. In addition, by tilting the electronic control unit forward and downward, the harness connected to the front surface of the electronic control unit faces downward (toward the engine), which facilitates cable routing.

According to the straddle-type vehicle of the present invention, it is possible to stably support the fuel tank while ensuring the capacity of the air cleaner.

1 is a side view showing a front portion of a motorcycle, which is a type of straddle-type vehicle according to a first embodiment of the present invention; FIG. It is a top view which shows the front part of the same two-wheeled motor vehicle. It is a side view which shows the mounting structure of the fuel tank of the same motorcycle. It is a side view which shows the periphery of the air cleaner of the same motorcycle by enlarging. It is a longitudinal cross-sectional view around the same air cleaner. It is a top view which shows the same air cleaner. FIG. 3 is a plan view showing a comparison between the arrangement of the same air cleaner and the arrangement of a conventional air cleaner; FIG. 11 is a side view showing a comparison between the arrangement of the same air cleaner and the arrangement of a conventional air cleaner;

Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a front portion of a motorcycle, which is a type of straddle-type vehicle according to the first embodiment of the present invention. In this specification, "right" and "left" refer to "right" and "left" as seen from the driver in the vehicle. Also, "upstream" and "downstream" mean "upstream" and "downstream" in the flow direction of intake air.

The body frame FR of the motorcycle of this embodiment has a main frame 1 forming a front half and a rear frame 2 forming a rear half. The rear frame 2 is joined to the rear portion of the main frame 1 . The main frame 1 extends obliquely downward rearward from a head pipe 4 at the front end. The main frame 1 of this embodiment has an upper frame 1a and a lower frame 1b. The upper frame 1a extends obliquely downward rearward from the upper portion of the head pipe 4. As shown in FIG. The lower frame 1b extends obliquely downward rearward from the lower portion of the head pipe 4. As shown in FIG. A radiator 5 for engine cooling water is supported by the lower frame 1b.

As shown in FIG. 2, a pair of left and right main frames 1 are provided. Specifically, a pair of left and right upper frames 1a and lower frames 1b are provided. The left and right main frames 1 have a frame front portion 6 extending rearward from the head pipe 4 , a frame central portion 8 extending rearward from the frame front portion 6 , and a frame rear portion 10 behind the frame front portion 6 .

Brackets 13 are joined to the front ends of the left and right frame front portions 6 . A first tank support portion 14 is provided on the upper surface of the bracket 13 . The first tank support portion 14 is made of sheet metal and fixed to the bracket 13 by welding. The first tank support portion 14 has a mounting surface 14a facing obliquely upward to the rear, and an engagement hole 14b is formed in the mounting surface 14a. In this embodiment, two engagement holes 14b are provided side by side in the vehicle width direction. A cleaner support portion 13 a is provided at the rear end of the bracket 13 . An upward mounting hole (not shown) is formed in the cleaner support portion 13a.

Rear ends of the left and right frame rear portions 10 are connected by a cross pipe 12 extending in the vehicle width direction. A second tank support portion 11 is provided on the cross pipe 12 . The second tank support portion 11 is made of sheet metal and fixed to the cross pipe 12 by welding. A mounting hole 11a facing upward is formed in the second tank support portion 11 .

The left and right frame front portions 6 widen outward in the vehicle width direction rearward from the head pipe 4 in a plan view. That is, the space between the left and right frame front portions 6 in the vehicle width direction increases toward the rear. The left and right frame center portions 8 extend rearward from the frame front portion 6 in parallel with each other. That is, the interval in the vehicle width direction between the left and right frame center portions 8 is substantially constant. In this embodiment, the frame rear portion 10 extends rearward while being inclined inward in the vehicle width direction. That is, the space between the left and right frame rear portions 10 in the vehicle width direction becomes smaller toward the rear. Therefore, at the frame central portion 8, the space between the left and right main frames 1 in the vehicle width direction is maximized.

Third tank support portions 15 are provided in the left and right frame central portions 8 . The third tank support portion 15 protrudes inward in the vehicle width direction from the frame central portion 8 . In this embodiment, the third tank support portion 15 is provided in the front-rear direction intermediate portion of the frame central portion 8 , that is, in the front-rear direction central portion of the main frame 1 . The third tank support portion 15 of this embodiment is formed by bending a sheet metal, and is fixed to the frame central portion 8 by welding. The third tank support portion 15 has a horizontal upper surface 15a, and a through hole 15b directed upward is formed in the upper surface 15a. However, the configuration of the third tank support portion 15 is not limited to this.

A pair of left and right front forks 16 are rotatably supported by a head pipe 4 at the front end of the main frame 1 shown in FIG. 1 via a steering shaft (not shown). A front wheel 18 is supported at the lower end of the front fork 16 . A handle 20 is attached to an upper bracket 17 that supports the upper end of the front fork 16 . A swing arm (not shown) is supported by the lower portion of the rear end of the main frame 1, and a rear wheel (not shown) is supported by the swing arm. An engine E is supported in the lower center of the main frame 1 . The engine E drives the rear wheels.

The engine E of this embodiment is a water-cooled 4-cylinder 4-cycle engine in which the cylinders are arranged in the vehicle width direction. However, the type of engine E is not limited to this. The engine E has a crankcase 22 supporting a crankshaft (not shown), a cylinder 24 projecting upward from the front of the crankcase 22, and a cylinder head 26 above it. An intake port 26 a through which intake air is introduced is formed on the rear surface of the cylinder head 26 . An exhaust port 26b is formed in the front surface of the cylinder head 26, through which exhaust gas is led out.

An air cleaner 25 is arranged above a cylinder head 26 of the engine E. As shown in FIG. The air cleaner 25 filters the air supplied to the engine E. Specifically, the air cleaner 25 has a cleaner case 34 and a cleaner element 35 ( FIG. 5 ) arranged inside the cleaner case 34 . Air is filtered as it passes through cleaner element 35 .

As shown in FIG. 2, the air cleaner 25 is arranged between the left and right main frames 1, 1 in plan view. A mounting piece 28 is provided on the front surface of the air cleaner 25 . A front portion of the air cleaner 25 is fixed to the cleaner support portion 13a of the main frame 1 with a bolt 23 via a mounting piece 28. As shown in FIG.

A cleaner inlet 25a is formed on the left side of the front of the air cleaner 25, and a cleaner outlet 25b is formed on the rear. One cleaner outlet 25b is arranged for each cylinder, and a total of four cleaner outlets 25b are provided side by side in the vehicle width direction. The cleaner outlet 25b of this embodiment is configured by a funnel that penetrates the bottom wall of the case of the air cleaner 25. As shown in FIG.

Recesses 36 recessed inward in the vehicle width direction are formed in both sidewalls of the cleaner case 34 in the vehicle width direction. The recessed portion 36 is formed in the front-rear direction intermediate portion of the air cleaner 25 . The recess 36 is located behind the cleaner element 35 . The third tank support portion 15 is arranged in the space obtained by providing the concave portion 36 . Details of the structure of the air cleaner 25 will be described later.

As shown in FIG. 1, a throttle body 27 is connected between the cleaner outlet 25b and the intake port 26a of the engine E. As shown in FIG. That is, the rear portion of the air cleaner 25 is supported by the engine E via the throttle body 27 . A throttle valve 27 a is provided inside the throttle body 27 . The throttle valve 27a adjusts the amount of intake air supplied to the engine E. A driving mechanism 27b for a throttle valve 27a is provided at the front portion of the throttle body 27. As shown in FIG. The drive mechanism 27b includes, for example, a motor, a motor gear, and the like. The drive mechanism 27b protrudes upward from the front portion of the throttle body 27 .

An electronic control unit 38 is attached to the upper surface of the front half of the air cleaner 25 . The electronic control unit 38 controls the operation of the vehicle and the engine. The electronic control unit 38 is attached to the air cleaner 25 by being covered with a rubber cover (not shown) and engaging a projection (not shown) provided on the upper surface of the air cleaner 25 with the rubber cover. The mounting method of the electronic control unit 38 is not limited to this. A connector 38 a is provided on the front surface of the electronic control unit 38 . A cable 39 is connected to the connector 38a.

A fuel tank 40 is arranged above the air cleaner 25 . As shown in FIG. 2 , the fuel tank 40 is arranged between the left and right main frames 1 , with its front end located behind the head pipe 4 and its rear end located near the cross pipe 12 .

As shown in FIG. 3, an engagement projection 42 is provided on the lower surface of the front end of the fuel tank 40 and extends obliquely forward and downward. Two engaging protrusions 42 are provided side by side in the vehicle width direction. A bracket 44 is provided on the rear surface of the fuel tank 40 . The bracket 44 is formed by bending a sheet metal and is welded to the rear surface of the fuel tank 40 . The bracket 44 is formed with a bolt insertion hole 44a facing upward. Two bolt insertion holes 44a are provided side by side in the vehicle width direction.

An engaging protrusion 42 of the fuel tank 40 is inserted into the engaging hole 14b of the first tank support portion 14 of the main frame 1 via an elastic member 43 such as rubber. The front portion of the fuel tank 40 is thereby supported by the main frame 1 . An elastic body 45 such as rubber is attached to the through hole 15 b of the third tank support portion 15 . A front-rear intermediate portion of the bottom surface of the fuel tank 40 is placed on the third tank support portion 15 via the elastic body 45 . Thereby, the intermediate portion of the fuel tank 40 is supported by the main frame 1 .

A bolt 46 is inserted from above through the bolt insertion hole 44a of the bracket 44 on the rear surface of the fuel tank 40, and is fastened to the mounting hole 11a of the second tank support portion 11 of the cross pipe 12 via an elastic member 47 such as rubber. ing. The rear portion of the fuel tank 40 is thereby supported by the main frame 1 . As shown in FIG. 2, the third tank support portion 15 supports a portion of the fuel tank 40 having the largest width in the vehicle width direction. Therefore, the fuel tank 40 is stably supported.

A bottom plate of the fuel tank 40 shown in FIG. 1 is formed with a concave portion 48 that protrudes upward. The upper portion of the air cleaner 25 and the electronic control unit 38 are positioned in the space formed by providing the recessed portion 48 . That is, when viewed from the side, the upper portion of the air cleaner 25 and the electronic control unit 38 overlap the fuel tank 40 . Therefore, it is necessary to remove the fuel tank 40 in order to attach/detach and maintain the electronic control unit 38 . This makes it difficult for the electronic control unit 38 to be stolen.

The motorcycle of this embodiment has a front cowl 30 and a pair of left and right side cowls 32 . The front cowl 30 covers the front of the head pipe 4 . The side cowl 32 is arranged behind the front cowl 30 and covers the front part of the vehicle body, specifically the main frame 1 and the engine E from the outside. An air intake port 50 opening forward is formed in the front surface of the front cowl 30 . When the motorcycle runs, running wind A is taken in as intake air to the engine E from the air intake port 50 .

An intake duct 52 is provided to communicate the air intake port 50 and the air cleaner 25 . An inlet 52a at the front end of the air intake duct 52 shown in FIG. An outlet 52b at the rear end of the air intake duct 52 is connected to a cleaner inlet 25a on the front left side of the air cleaner 25 . That is, the air intake duct 52 takes in the running wind A from the air intake 50 and supplies it to the air cleaner 25 through the left side of the vehicle body.

As shown in FIG. 4, the cleaner case 34 has an upper case half 34a and a lower case half 34b which are divided into upper and lower halves. there is A mating surface 55 between the two case halves 34a and 34b extends along the main frame 1 in the front-rear direction. The “front-rear direction” here includes a direction slightly (for example, 10 to 20° or less) inclined from the horizontal direction. The cleaner inlet 25a is formed in the front portion of the lower case half 34b.

The upper surface of the front half of the upper case half 34a has an inclined surface 56 that is inclined upward toward the rear with respect to the mating surface 55. As shown in FIG. An electronic controller 38 is attached to the inclined surface 56 . The upper surface of the rear half of the upper case half 34a is formed with a curved surface 57 that smoothly bulges upward and smoothly curves downward at the rear portion.

As shown in FIG. 5, the cleaner element 35 is housed in the front portion of the cleaner case 34 . A dirty chamber 33 is located upstream of the cleaner element 35 in the cleaner case 34 , and a clean chamber 37 is located downstream thereof. The cleaner element 35 has a filter portion 62 through which air passes and a mounting portion 64 on the outer periphery of the filter portion 62 . The mounting portion 64 is pressed by the upper case half 34a, and its rear portion is fixed to the lower case half 34b by a screw 65. As shown in FIG. The fixing method of the cleaner element 35 is not limited to this.

The cleaner inlet 25 a is provided below the cleaner element 35 and the inclined surface 56 is formed above the cleaner element 35 . The cleaner outlet 25b is formed at the rear end of the lower case half 34b.

A front wall 59 of the cleaner case 34 extends substantially vertically. The front half of the bottom wall 58 of the cleaner case 34 extends rearward along the upper surface of the cylinder head 26 while being inclined upward. A rear half portion of the bottom wall 58 extends obliquely downward toward the rear. A recess 60 recessed upward is formed in the rear half of the bottom wall 58 of the cleaner case 34 . A part of the driving mechanism 27b of the throttle body 27 is accommodated in the space formed by providing the recess 60. As shown in FIG.

As shown in FIG. 6, the width dimension between the left and right concave portions 36 inside the cleaner case 34 is W1, and the width dimension of the cleaner element 35 inside the cleaner case 34 is W2. In this embodiment, the width dimension W1 between the recesses 36, 36 is set smaller than the width dimension W2 of the cleaner element 35 (W1<W2). The width dimension W2 of the cleaner element 35 is the width dimension of the attachment portion 64 of the cleaner element 35, that is, the dimension of the portion of the attachment portion 64 where the width dimension is the largest.

Let W3 be the width dimension of the filter portion 62 of the cleaner element 35 . In this embodiment, the width dimension W1 between the concave portions 36, 36 is set larger than the width dimension W3 of the filter portion 62. As shown in FIG. However, the width dimension W1 between the concave portions 36, 36 may be equal to or less than the width dimension W3 of the filter portion 62. Let W4 be the width dimension of the cleaner outlet 25b. In this embodiment, the width dimension W1 between the recesses 36, 36 is set smaller than the width dimension W4 of the cleaner outlet 25b. Here, the "width dimension of the cleaner outlet" refers to the distance between the outer edges in the vehicle width direction of the cleaner outlets 25b at both ends of the cleaner outlets 25b arranged in the vehicle width direction. However, the relationship between the width dimensions W1 to W4 is not limited to these.

Next, the flow of intake air in the motorcycle of this embodiment will be described. When the motorcycle runs, running wind A shown in FIG. Air A introduced into the intake duct 52 is introduced into the air cleaner 25 .

The air A introduced into the air cleaner 25 is filtered by the cleaner element 35 inside the air cleaner 25 to become clean air CA, as shown in FIG. The clean air CA is guided rearward by the inclined surface 56 of the cleaner case 34 in the clean room 37 and flows toward the rear cleaner outlet 25b. The clean air CA is supplied to the engine E through the throttle body 27 from the cleaner outlet 25b.

As shown in FIG. 7, the conventional air cleaner 100 is arranged between the left and right frame central portions 8, 8 with the largest distance, and the conventional third tank support portion 101 that supports the intermediate portion of the fuel tank 40 is the air cleaner. It was installed in front of 100. That is, the fuel tank 40 is supported by the first tank support portion 14 at the front end, the second tank support portion 11 at the rear end, and the third tank support portion 101 in the middle. In this case, the intermediate third tank support portion 101 supports a portion of the fuel tank 40 which is closer to the front than the intermediate portion in the front-rear direction and whose width dimension is not the maximum.

On the other hand, according to the above-described embodiment of the present invention, as indicated by the dashed line in FIG. The wall is provided with a recess 36 in which the third tank support 15 is arranged. Further, since a space is obtained in front of the air cleaner 100 by omitting the conventional third tank support portion 101, the air cleaner 25 is extended forward.

As a result, the fuel tank 40 is stably supported because the tank support portion 15 supports the portion of the fuel tank 40 having the widest width in the front-rear direction intermediate portion. Further, since the overall size of the cleaner case 34 in the vehicle width direction does not change only by providing the recesses 36 on both side walls of the cleaner case 34 in the vehicle width direction, it is possible to prevent the capacity of the air cleaner from becoming excessively small. Furthermore, since the longitudinal dimension of the air cleaner 25 is increased, the volume of the clean chamber 37 is increased by about 10% compared to the conventional air cleaner 100 even with the recess 36 provided.

As shown in FIG. 6, the width dimension W1 between the recesses 36, 36 is set smaller than the width dimension W2 of the cleaner element 35. As shown in FIG. Thereby, a space for providing the third tank support portion 15 can be secured while securing the surface area (filtering area) of the cleaner element 35 . Also, the width dimension W1 between the concave portions 36, 36 is set larger than the width dimension W3 of the filter portion 62. As shown in FIG. As a result, even if the recess 36 is provided in the cleaner case 34, an air passage having a width dimension W3 or more of the filter portion 62 is ensured.

A width dimension W1 between the recesses 36, 36 is set smaller than a width dimension W4 of the outlet 25b. As a result, the width of the air cleaner 25 near the outlet 25b can be increased to secure the capacity of the air cleaner 25, and at the same time, the space for the tank support portion 15 can be secured.

As shown in FIG. 5, since the upper surface (inclined surface 56) of the front half of the air cleaner 25 is inclined upward toward the rear, the air CA is guided rearward by the inclined surface 56, and the air CA flows smoothly. become. Further, since most of the rear half of the upper wall of the air cleaner 25 except for the rear portion is a curved surface 57 and is not inclined downward, the height inside the cleaner case 34 is increased in the rear half. Thereby, the volume of the clean room 37 can be secured.

An electronic control unit 38 is attached to the inclined surface 56 of the air cleaner 25 . Since the electronic control unit 38 is arranged near the engine E, the length of the cable 39 between the engine E and the electronic control unit 38 can be shortened. As a result, weight reduction can be achieved, and noise is less likely to enter the cable 39 .

Further, since the electronic control unit 38 is attached to the inclined surface 56, the electronic control unit 38 is also inclined forward and downward. As a result, it is possible to prevent the front half of the electronic control unit 38 from pressing the fuel tank 40, and the capacity of the fuel tank 40 can be easily secured. In addition, by tilting the electronic control unit 38 forward and downward, the cable 39 connected to the front surface of the electronic control unit 38 is directed downward toward the engine E, so that the handling of the cable 39 is facilitated.

FIG. 8 shows a conventional air cleaner 200 that does not have the inclined surface 56 by a chain double-dashed line. If the electronic control unit 38 is arranged on the upper surface of the air cleaner 200, it interferes with the fuel tank 40. As shown in FIG. Therefore, in the above-described embodiment, the air cleaner 25 is arranged below the air cleaner 200 of the conventional example, and the upper surface of the front half of the air cleaner 25 is formed as the inclined surface 56, and the electronic control unit 38 is arranged on this upper surface.

By arranging the air cleaner 25 below, there is concern about interference with the engine E and the throttle body 27 . In the embodiment described above, the bottom wall 58 of the cleaner case 34 extends along the top surface of the cylinder head 26 . Further, the bottom wall 58 is formed with a recess 60 that is recessed upward, and the drive mechanism 27b of the throttle body 27 is housed in the recess 60. As shown in FIG. As a result, the bottom wall 58 of the cleaner case 34 can be positioned as low as possible to ensure the capacity of the air cleaner 25, while preventing the cleaner case 34 from interfering with the engine E and the throttle body 27. FIG.

As shown in FIG. 5, the cleaner case 34 is constructed by connecting upper and lower case halves 34a and 34b. Therefore, the cleaner element 35 can be attached and detached by removing the fuel tank 40 and the upper case half 34a, so maintenance is easy. Further, as shown in FIG. 4, since the mating surface 55 between the upper case half 34a and the lower case half 34b extends in the longitudinal direction along the main frame 1, both case halves 34a including the mating surface 55 , 34b and the main frame 1 can be easily prevented from interfering with each other.

The present invention is not limited to the above embodiments, and various additions, changes, or deletions are possible without departing from the scope of the present invention. For example, in the above embodiments, a motorcycle has been described, but the present invention can also be applied to straddle-type vehicles other than motorcycles, such as tricycles and four-wheel buggies. Accordingly, such are also included within the scope of this invention.

1 main frame 4 head pipe 15 third tank support (tank support)
25 air cleaner 25a cleaner inlet (air cleaner inlet)
25b Cleaner outlet (air cleaner outlet)
26 Cylinder head 26a Intake port 27 Throttle body 34 Cleaner case 34a Upper case half 34b Lower case half 35 Cleaner element 36 Recess 38 Electronic control unit 40 Fuel tank 55 Case half mating surface 58 Cleaner case bottom wall 60 Concave Location 62 Filter part 64 Mounting part E Engine W1 Width dimension between left and right recesses W2 Width dimension of cleaner element W3 Width dimension of filter part W4 Width dimension of outlet

Claims (6)

a pair of left and right main frames extending rearward from the head pipe;
an air cleaner disposed above the cylinder head of the engine between the pair of left and right main frames;
a fuel tank arranged above the air cleaner,
concave portions recessed inward in the vehicle width direction are formed on both side walls in the vehicle width direction of a cleaner case of the air cleaner,
A tank support portion for supporting the fuel tank is provided so as to protrude inward in the vehicle width direction from the left and right main frames,
the tank support is disposed in the recess,
A straddle-type vehicle , wherein the width dimension between the left and right concave portions inside the cleaner case is set smaller than the width dimension of the cleaner element inside the cleaner case . 2. The straddle-type vehicle according to claim 1 , wherein the cleaner element has a filter portion through which air passes and an attachment portion on the outer circumference of the filter portion,
A straddle-type vehicle in which a width dimension between the recesses is set larger than a width dimension of the filter portion. 3. The straddle-type vehicle according to claim 1 , wherein the engine is a multi-cylinder engine in which a plurality of cylinders are arranged in the vehicle width direction,
The outlets of the air cleaner are arranged side by side in the vehicle width direction corresponding to each cylinder,
A straddle-type vehicle, wherein the width dimension between the recesses is set smaller than the width dimension of the exit. The straddle-type vehicle according to any one of claims 1 to 3 , further comprising a throttle body connecting an outlet of the air cleaner and an intake port of the cylinder head,
A saddle-ride type vehicle, wherein the bottom wall of the cleaner case is formed with an upwardly recessed recess in which a part of the throttle body is accommodated. 5. The straddle-type vehicle according to any one of claims 1 to 4 , wherein the cleaner case is configured by connecting upper and lower case halves,
A straddle-type vehicle in which mating surfaces of both case halves extend in the front-rear direction along the main frame. The straddle-type vehicle according to claim 5 , wherein an inlet and a cleaner element are provided in the front half of the air cleaner, and an outlet is provided in the rear half,
An electronic control device is attached to the upper surface of the front half of the air cleaner,
the inlet is formed in a lower portion of the front half of the air cleaner;
A straddle-type vehicle in which an upper surface of a front half portion of the air cleaner is inclined upward toward the rear with respect to the mating surface.

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